2006 Proceedings of HPM 2004 & ESU 4. The historical development of multiplication concepts and processes: Implications for developing multiplicative thinking. p. 42-47. Auteur : Booker George
2016 History and Pedagogy of Mathematics: july 18-22 2016, Montpellier, France. Archimedes and visual reasoning – How a geometric game led to combinatorics. p. 336-340. Auteur : Booker George
